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Abstract

We experimentally demonstrated single-shot phase imaging with a coded aperture (SPICA), which connects digital holography and coherent diffractive imaging based on compressive sensing to realize the advantages of both methods simultaneously. SPICA allows the observation of a complex field with a simple, single-shot optical setup that does not need reference light and does not suffer from losses associated with the field-of-view and spatial resolution. Experiments showed the promising capabilities of SPICA for single-shot holographic imaging.

Figures (6)

Experimental results with two wires. (a) The CA pattern and (b) the captured image. (c) The amplitude and (d) the phase of the retrieved field on the CA. (e) The amplitude and (f) the phase of the reconstructed field at zo1. (g) The amplitude and (h) the phase of the reconstructed field at zo2. Phases are normalized in the interval [−π,π]. Black lines in Figs. (e) and (g) show the positions of the line profiles in Fig. 3.

Experimental results with mixture of oil and water. (a) The captured image. (b) The amplitude and (c) the phase of the retrieved field on the CA. (d) The amplitude and (e) the phase of the reconstructed field. (f) The unwrapped phase of (e). (g) Image of the region surrounded by the square in Fig. (d) observed with a microscope, where the scale bar is 200 μm.